Vent-box.



W. W.'BYTHINER & F. MONTAGUE.

VENT BOX.

APPLICATION FILED JUNE 5. 1918.

Patented Dec. 10,1918.

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WILLIAM W. BYTHINER AND FRANK MONTAGUE, OF PHILADELPHIA, PENNSYLVANIA.

VENT-BOX.

Specification of Letters Patent.

Patented Dec. 10, 1918.

Application filed June 5, 1918. Serial No. 238,378.

To all whom it may concern:

Be it known that we, WIL IAMVV. BYTE- INER and FRANK MONTAGUE, citizensof the United States, residing 'at Philadelphia, in

the county of Philadelphia and State of Pennsylvania, have inventedcertain new and useful Improvements in Vent-Boxes, of which thefollowing is a specification.

Our invention relates to improvements in vent-boxes adapted to be usedupon pipes for ventilating drainage systems.

The object of our invention is to provide a vent box which will preventthe insertion of sticks and pieces of wire which would clog the drainagesystem; a further object of our invention is to so construct the ventbox that small particles of dirt and dust cannot accumulate in the ventbox, but will fall or be washed into the drainage system; and a furtherobject of our invention is to construct the vent box in such a mannerthat it cannot be readily displaced from the pipe upon which it is used.

Referring to the drawing; Figure 1, is a vertical section illustratingour improved ventbox; Fig. 2, is a plan view of the cover of the ventbox; Fig. 3, is a horizontal section on line 3-3 Fig. 1; and Fig. 4, isa vertical section of a modified form of the vent box.

In the accompanying drawing in which like reference characters refer tolike parts, 1 represents the cover provided with elongated orifices 2,as shown in Fig. 2. A coni-' cal or funnel shaped member 4, is locatedimmediately below the cover 1. Said conical member 4 is open at thebottom for the free passage of dirt which may enter through the orifices2 in the cover 1.

The conical member 4, is provided with a flange 5, at the top edgethereof, upon which rests the cover 1 which may be fastened thereto byscrews 6, or any other suitable fastening devices.

Suspended from the cover 1 is a rod 7 on which are secured shields 8 and9, preferably made conical or dome shape so that any foreign bodiescannot lodge upon them. The rod 7 is provided with a screw thread andits upper end is screwed into a threaded aperture in the cover 1 and theshields 8 and 9 are each provided with a threaded aperture which permitsthem to be screwed upon the rod 7.

the rod 7 that they will be held a sufficient distance above and belowthe reduced portion of the conical member 4, to form free ventilatingspaces through the vent box.

The shields 8 and 9 are of as great a diameter as will permit them topass through the throat or central opening of the conical member 4, whenit is desired to remove the cover from the conical member 4. The redueed portion of the conical member 4 forms a collar which will cause astick or Wire to rest upon the shield 9, located immediately below thecollar and the upper shield will prevent the upper end of the stick orwire from being brought to a central position, which would be necessarybefore the same could pass between the shield 9 and the collar formingthe throat of the conical member 4.

The conical or funnel shaped member 4 may be provided with a dependingflange 12 having an enlarged collar 13 thereon for the purpose offorming a coupling member by which a permanent connection may be readilymade with the drain pipe 15, shown in dotted lines Fig.1.

Where it is not desired to make a permanent connection with the drainpipe the vent box may be made without the flange or coupling member 12,in which form the flange 5 of the conical member 4 will rest upon theupper end 14 of the drain pipe 15, as shown in dotted lines Fig. 4.

Our improved vent box may be manufactured at a very low cost; the coverbeing provided with elongated orifices will permit of greaterventilation than could be obtained with circular orifices; the funnelmember 4 and the shields 8 and 9 are so arranged that it is impossibleto force a stick or piece of wire through the vent box, and the couplingmember 12 forms a means for readily making a permanent connection withthe drain pipe.

Our improved vent box is self cleaning and therefore particularlyadapted for use on sidewalks where the cover of the vent box is flushwith the surface of the sidewalk.

Having thus described our invention we claim and desire to secure byLetters Patent:

1. A vent box for drains comprising a cover having orifices formedtherein, shields suspended from said cover, a funnel shaped memberhaving a central opening forming a free air space through the vent box,said funnel member having its contracted portion located between saidshields and the lower one of said shields being smaller in diameter thanthe contracted portion of the funnel member.

2. A vent box for drains comprising a cover having orifices formedtherein, a rod rigidly secured in the cover, a shield upon the rodadjacent to, the cover, an inverted conical member having a centralopening formed therein and forming a free passageway through the ventboX, and a second shield upon said Ted located below the said conicalmember. I

3. A vent boX for drains comprising a cover having orifices formedtherein, a funnel shaped member upon which the cover is secured, a rodrigidly secured to said cover,

Copies of this patentmay be obtained for shields secured to said rod,said shields having their upper surfaces beveled, said shields locatedabove and below the contracted portion of the funnel member with a freeair space formed between the shields and the funnel member, and thelower one of said shields being smaller in diameter than the contractedportion of the funnel member to permit the said shield to pass throughthe funnel member when the cover is removed.

In testimony whereof we affiX our signatures in the presence of awitness.

WILLIAM W. BYTHINER. FRANK MONTAGUE. W'itness:

MEYER KRAUs.

five cents each, by addressing the Commissioner of I'a'tents,Washington, D. 0."

